Writing field to file in GRIB with grib_decoder.save() doesn't work for GRIB1 fields

[ninaburg]

• meteodata-lab version: v0.2.0-rc3
• grib_decoder.save() causes an issue

---

Description

Applying the flexpart operator on data which contain many params in GRIB1 and writing back to a file in GRIB raises the error that the forecasTime key is not found (it corresponds to the lead_time):

2024-10-01 21:06:39.092     INFO 1 --- [     MainThread] flexprep.domain.processing._save_output : Writing GRIB field sp to /tmp/tmppfypudxroutput_dispf2024093000003 with dimensions: ('ref_time', 'lead_time', 'y', 'x')
ECCODES ERROR   :  grib_set_values[1] forecastTime (type=double) failed: Key/value not found
2024-10-01 21:06:39.094    ERROR 1 --- [     MainThread] earthkit.data.utils.message.set_multiple: Error setting: {'indicatorOfUnitOfTimeRange': 0, 'forecastTime': 180.0, 'dataDate': '20240930', 'dataTime': '0000'}
2024-10-01 21:06:39.094    ERROR 1 --- [     MainThread] earthkit.data.utils.message.set_multiple: Key/value not found
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/earthkit/data/utils/message.py", line 196, in set_multiple
    eccodes.codes_set_key_vals(self._handle, values)
  File "/usr/local/lib/python3.11/site-packages/gribapi/gribapi.py", line 1741, in grib_set_key_vals
    GRIB_CHECK(err)
  File "/usr/local/lib/python3.11/site-packages/gribapi/gribapi.py", line 226, in GRIB_CHECK
    errors.raise_grib_error(errid)
  File "/usr/local/lib/python3.11/site-packages/gribapi/errors.py", line 381, in raise_grib_error
    raise ERROR_MAP[errid](errid)
gribapi.errors.KeyValueNotFoundError: Key/value not found
2024-10-01 21:06:39.124    ERROR 1 --- [     MainThread] flexprep.domain.processing._save_output : Failed to save or upload output file: Key/value not found
Traceback (most recent call last):
  File "/src/flexprep/domain/processing.py", line 131, in _save_output
    grib_decoder.save(field, output_file)
  File "/usr/local/lib/python3.11/site-packages/meteodatalab/grib_decoder.py", line 434, in save
    metadata = md.override(to_grib(loc))
               ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/earthkit/data/readers/grib/metadata.py", line 257, in override
    handle.set_multiple(d)
  File "/usr/local/lib/python3.11/site-packages/earthkit/data/utils/message.py", line 196, in set_multiple
    eccodes.codes_set_key_vals(self._handle, values)
  File "/usr/local/lib/python3.11/site-packages/gribapi/gribapi.py", line 1741, in grib_set_key_vals
    GRIB_CHECK(err)
  File "/usr/local/lib/python3.11/site-packages/gribapi/gribapi.py", line 226, in GRIB_CHECK
    errors.raise_grib_error(errid)
  File "/usr/local/lib/python3.11/site-packages/gribapi/errors.py", line 381, in raise_grib_error
    raise ERROR_MAP[errid](errid)
gribapi.errors.KeyValueNotFoundError: Key/value not found
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/src/flexprep/__main__.py", line 59, in <module>
    launch_pre_processing(ifs_forecast_obj)
  File "/src/flexprep/domain/prepare_processing.py", line 70, in launch_pre_processing
    Processing().process(process_items)
  File "/src/flexprep/domain/processing.py", line 38, in process
    self._save_output(
  File "/src/flexprep/domain/processing.py", line 131, in _save_output
    grib_decoder.save(field, output_file)
  File "/usr/local/lib/python3.11/site-packages/meteodatalab/grib_decoder.py", line 434, in save
    metadata = md.override(to_grib(loc))
               ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/earthkit/data/readers/grib/metadata.py", line 257, in override
    handle.set_multiple(d)
  File "/usr/local/lib/python3.11/site-packages/earthkit/data/utils/message.py", line 196, in set_multiple
    eccodes.codes_set_key_vals(self._handle, values)
  File "/usr/local/lib/python3.11/site-packages/gribapi/gribapi.py", line 1741, in grib_set_key_vals
    GRIB_CHECK(err)
  File "/usr/local/lib/python3.11/site-packages/gribapi/gribapi.py", line 226, in GRIB_CHECK
    errors.raise_grib_error(errid)
  File "/usr/local/lib/python3.11/site-packages/gribapi/errors.py", line 381, in raise_grib_error
    raise ERROR_MAP[errid](errid)
gribapi.errors.KeyValueNotFoundError: Key/value not found